Résultats de la recherche
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Winter distribution of chinstrap penguins from two breeding sites in the South Shetland Islands of Antarctica
on King George Island (620 10’ S, 580 27’ W) were instrumented with satellite tags following their ... that 4 of the birds instrumented in the 2000 winter, two from each colony, foraged largely on the shelf ... geostrophic velocities, suggest that the chinstrap penguins used markedly different winter foraging habitats ... migrating eastward. Both of these penguins followed the Scotia Arc with the chinstrap penguin tagged in 2004 ...
Meeting Document : WG-EMM-06/17 : Auteur(s): W.Z. Trivelpiece, S. Buckelew, C. Reiss and S.G. Trivelpiece (USA)
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Abundance and trends of Type B killer whales (Orcinus orca) around the western Antarctic Peninsula
B killer whales: a larger mammal-eating form (B1) that apparently specializes on hunting ice seals ... on pack ice floes, and a smaller, more gregarious form (B2) that has been observed to feed on ... summer, with periodic long-distance migrations to sub-tropical waters (up to 4151 km from tagging site ... temporary emigration from the study area indicated that B1s were stable in abundance, ranging from 39 to 53 ...
Meeting Document : WG-EMM-18/16 : Auteur(s): H. Fearnbach, J.W. Durban, D.K. Ellifrit and R.L. Pitman
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Champsocephalus gunnari stock status in the South Georgia area
and TAC for C. gunnari. Stock estimates were obtained using VPA with the following variations: mean F ... prediction the stock size value was obtained by VPA with variations using F regression methods. The ... predicted period fishing intensity was at the level of that in 1987/88; (c) For the predicted period fishing ... shows that at the currently used value of stock size and even at the lowest possible recruitment levels ... if FO.1 = 0.439. * All stock status and TAC predictions were made with the assumption that ... were obtained using VPA with the following variations: mean F, Gamma methods, Pope and Shepherd method ... obtained by VPA with variations using F regression methods. The recruitment was taken at the lowest ... fishing intensity was at the level of that in 1987/88; ( c ) For the predicted period fishing intensity ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 1-18 : Auteur(s): Borodin, R. and P. Kochkin
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On the presence of Paralomis spinosissima and Paralomis formosa in catches taken during the Spanish survey Antártida 8611
160 to 627 m and that of P. formosa, far less frequent in the catches, from 320 to 350 m. Field ... observations showed that these two species were absent from the southern archipelagos of the Scotia Arc (South ... hauls where Paralomis spp. were found, together with the qualitative composition of the fish fauna ... usually accompanying them in the catches, suggest that P. spinosissima and P. formosa tend to concentrate ... been caught (Balguerias, pers. comm.). Therefore, the only possibility that these species are to be ... Taken During Spanish Survey This evidence would seem to be in contradiction with the area of ... observations made during the Spanish survey did not allow that possibility to be confirmed. Ovigerous females ... appropriate harvest levels. This paper constitutes a contribution to that workshop and contains the m o s t ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 165–173 : Auteur(s): López Abellán, L.J. and E. Balguerías
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The use of predator-derived krill length-frequency distributions to calculate krill target strength
directly with automated on board data collection systems it will be possible to gain important estimates of ... operations. This will allow a robust estimate of krill abundance to be estimated from acoustic data. Changes ...
Meeting Document : WG-EMM-00/42 : Auteur(s): K. Reid and A.S. Brierley (United Kingdom)
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Admiralty Bay (South Shetland Islands) as a model area for the long-term marine monitoring program – reasons and opportunities
numerous scientific, data archives, to compare biological, chemical and geological data with other ... ). Admiralty Bay is an ideal and unique area to examine actual and further potential changes, and can be a ... model and possible indicator for the whole region. It would be a unique, comprehensive approach to these ...
Meeting Document : WG-EMM-14/59 : Auteur(s): A. Panasiuk-Chodnicka, M. Korczak-Abshire, M.I. Żmijewska, K. Chwedorzewska, E. Szymczak, D. Burska, D. Pryputniewicz-Flis and K. Łukawska-Matuszewska (Poland)
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Krill of the Ross Sea: distribution, abundance and demography of Euphausia superba and Euphausia crystallorophias during the Italian Antarctic expedition (January–February 2000)
, in the area north of Continental Shelf, was 9.3 g/1000m3 of filtered water with a mean density of ... dominance in the High Antarctic Zone (south of 74°), with a mean relative biomass of 3.0 g/1000m3 and mean ... density of 19.1 ind/1000m3. The present data have demonstrated that in the Ross Sea during the summer ... period, the two species of euphausiid inhabited different areas. Oceanographic data indicate that both ...
Meeting Document : WG-EMM-02/32 Text : Auteur(s): A. Sala, M. Azzali and A. Russo (Italy)
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Apparent decrease of Weddell seal numbers in the western Ross Sea
Abstract: Ground counts during 1959-1968 compared with counts using high resolution satellite ... Sea ecosystem that would have negatively affected seals has been the large-scale removal of large ... . Coincident with the fishery, lower numbers and size of toothfish have been reported in McMurdo Sound and data ... -scale seal monitoring program is required to prove that the fishery is not involved. Author(s): D.G ...
Meeting Document : WG-EMM-14/44 : Auteur(s): D.G. Ainley, M.A. Larue (USA), I. Stirling (Canada), S. Stammerjohn and D.B. Siniff (USA)
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Identification of Pleuragramma antarctica larvae in the Ross Sea via mitochondrial DNA
as P. antarctica. Consistent with the previous report, D-Loop sequences also demonstrated that ... in a fraction of samples. Sequences were aligned with known GenBank sequences for P. antarctica and ... P. antarctica that depart from expectation Author(s): J.A. Caccavo (Italy), C. Brooks (USA), L ...
Meeting Document : WG-FSA-15/61 : Auteur(s): J.A. Caccavo (Italy), C. Brooks (USA), L. Zane (Italy) and J.R. Ashford (USA)
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The random stratified trawl survey to estimate the abundance of Dissostichus eleginoides and Champsocephalus gunnari in the waters surrounding Heard Island (Division 58.5.2) for 2017
April, with the completion of 163 stations. The survey has been conducted on the FV Atlas Cove since ... surveys, but with a new set of randomly selected station points. The unstratified density of Dissostichus ... eleginoides (Patagonian toothfish) was 1.5 times greater than that of 2016 and also of the long-term average ... slightly larger than that of 2016 and 2.5 times the average. For the managed by-catch species, unstratified ...
Meeting Document : WG-FSA-17/14 Rev. 1 : Auteur(s): G.B. Nowara, T.D. Lamb and P. Ziegler